package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealDTO) {
        PageHelper.startPage(setmealDTO.getPage(), setmealDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //保存1条套餐数据
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();
        //保存n条套餐菜品数据
        List<SetmealDish> dishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : dishes) {
            setmealDish.setSetmealId(setmealId);
        }
        setmealDishMapper.insertBatch(dishes);

    }

    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        //查询套餐菜品数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        //组装VO数据并返回
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    @Transactional
    @Override
    public void updateWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //修改1条套餐数据
        setmealMapper.update(setmeal);
        Long setmealId = setmeal.getId();
        //删除套餐菜品数据
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> dishes = setmealDTO.getSetmealDishes();
        //保存n条套餐菜品数据
        if (dishes != null && !dishes.isEmpty()) {
            for (SetmealDish setmealDish : dishes) {
                setmealDish.setSetmealId(setmealId);
            }
            setmealDishMapper.insertBatch(dishes);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {

            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && !dishList.isEmpty()) {
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否在售
        List<Setmeal> setmeals = setmealMapper.getByIds(ids);
        for (Setmeal setmeal : setmeals) {
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //当前套餐处于上架状态，不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //删除套餐表数据
        setmealMapper.deleteBatch(ids);
        //删除套餐菜品表数据
        setmealDishMapper.deleteBySetmealIds(ids);
    }


}
